Exergetic and Economic Evaluation of CO<sub>2</sub> Liquefaction Processes
The transport of CO<sub>2</sub>, as a part of the carbon capture and storage chain, has received increased attention in the last decade. This paper aims to evaluate the most promising CO<sub>2</sub> liquefaction processes that can be used for port-to-port and port–offshore CO...
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| Autores principales: | , |
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| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
MDPI AG
2021
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| Materias: | |
| Acceso en línea: | https://doaj.org/article/a02dfd78020b4401aa3009f5133663d6 |
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| Sumario: | The transport of CO<sub>2</sub>, as a part of the carbon capture and storage chain, has received increased attention in the last decade. This paper aims to evaluate the most promising CO<sub>2</sub> liquefaction processes that can be used for port-to-port and port–offshore CO<sub>2</sub> ship transportation. The energetic, exergetic, and economic analyses are applied. The liquefaction pressure has been set to 15 bar (liquefaction temperature −30 °C), which corresponds to the design of the existing CO<sub>2</sub> carriers. The three-stage vapor-compression process has been selected among closed systems (with propane-R290, ammonia-R717, and R134a as the working fluid) and the precooled Linde–Hampson process—as the open system (with R717). The three-stage vapor-compression process R290 shows the lowest energy consumption, and the CO<sub>2</sub> liquefaction cost 21.3 USD/tCO<sub>2</sub>. Although the power consumption of precooled Linde–Hampson process is 3.1% higher than the vapor-compression process with R209, the lowest total capital expenditures are notable. The CO<sub>2</sub> liquefaction cost of precooled Linde–Hampson process is 21.13 USD/tCO<sub>2</sub>. The exergetic efficiency of the three-stage vapor-compression process with R290 is 66.6%, while the precooled Linde–Hampson process is 64.8%. |
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